<p>Do they matter? </p>
<p>Of course they matter.</p>
<p>Why wouldn’t they matter? Also, many schools reserve captain roles for senior upperclassmen as well, so senior year varsity sports can matter.</p>
<p>I see that you’ve done basketball since sophomore year, it’s well worth doing it your senior year, as colleges like to see a commitment to your EC’s. However, trying to do “one year” of track or some other sport would not make as much of a difference (unlike that additional year in basketball) in admissions.</p>
<p>Good Luck!</p>